Recently an updated version of the the Greenpois0n tool became available for Mac users and allowed for untethered jailbreaking of iOS 4.2.1 devices. Now Windows users are finally able to get in on the fun as well.

Been itching to jailbreak your iOS 4.2.1 device? Got a Mac? Then you're in luck because the Chronic Dev Team has just released a new Mac version of its Greenpois0n jailbreak tool. [Greenpois0n via Engadget]